The giant clam, scientifically known as *Tridacna gigas*, is the largest living bivalve mollusk. These clams can weigh over 500 pounds and grow up to four feet in length. They are primarily found in warm, shallow waters of the Coral Triangle, which includes parts of the Philippines, Indonesia, and Papua New Guinea. Giant clams are unique because they have a symbiotic relationship with algae called zooxanthellae. This algae lives in the clam's tissues and helps it produce food through photosynthesis, providing energy for the clam. In return, the clam offers the algae a safe habitat and access to sunlight.